#!/usr/bin/env python
# Licensed to Cloudera, Inc. under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  Cloudera, Inc. licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
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# See the License for the specific language governing permissions and
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import os
import pwd
import sys
import logging

from django.core import management
from django.core.management.base import BaseCommand
from django.db import transaction

from desktop.models import SAMPLE_USER_OWNERS, Directory, Document, Document2, Document2Permission
from useradmin.models import User, get_default_user_group, install_sample_user

LOG = logging.getLogger()


class Command(BaseCommand):
  args = '<user>'
  help = 'Install examples but do not overwrite them.'

  def handle(self, *args, **options):
    if not options.get('user'):
      user = User.objects.get(username=pwd.getpwuid(os.getuid()).pw_name)
    else:
      user = options['user']
    dialect = options.get('dialect', 'hive')

    # Install sample notebook from fixture if notebook with sample UUID doesn't exist
    if not Document2.objects.filter(uuid="7f2ea775-e067-4fde-8f5f-4d704ab9b002").exists():
      sample_user = install_sample_user()

      with transaction.atomic():
        management.call_command('loaddata', 'initial_notebook_examples.json', verbosity=2)

        Document.objects.sync()

      # Get or create sample user directories
      home_dir = Directory.objects.get_home_directory(sample_user)
      examples_dir, created = Directory.objects.get_or_create(
        parent_directory=home_dir,
        owner=sample_user,
        name=Document2.EXAMPLES_DIR
      )

      Document2.objects.filter(type='notebook', owner__username__in=SAMPLE_USER_OWNERS).update(parent_directory=examples_dir)

      # Share with default group
      examples_dir.share(sample_user, Document2Permission.READ_PERM, groups=[get_default_user_group()])
      LOG.info('Successfully installed sample notebook')

    from beeswax.management.commands.beeswax_install_examples import Command
    Command().handle(dialect=dialect, user=user)
